Liver Shunts in Dogs (Canine Portosystemic)

Definition

Portosystemic shunts (PSS), also known as liver shunts or portosystemic vascular anomalies, are anatomical defects where one or more veins let blood bypass a dog’s liver. These veins are remnants of embryonic blood vessels that are supposed to regress shortly after a puppy is born. What causes portosystemic shunts is unknown. They may be caused by some insult to fetuses inside the womb. There almost certainly is a strong genetic component. As the abnormal veins shunt blood around the liver, substances that normally would be filtered, metabolized or modified by the liver stay in circulation. Many of these, especially ammonia, are harmful - especially to nervous system tissue. Affected dogs usually develop symptoms by 1 year of age. The signs of PSSs are nonspecific and episodic. They include lethargy, weakness, disorientation, drooling, vocalization, vision disturbances, pacing, stunted growth, vomiting, diarrhea, constipation, appetite changes, changes in urination, itchy skin, tremors, seizures and collapse.

How Portosystemic Shunts in dogs are diagnosed: Underlying conditions associated with Portosystemic Shunts may create complications, so your veterinarian is always the best resource to successfully diagnose this condition.

Identifying the symptoms and signs of Portosystemic Shunts in dogs is the first step to knowing if your dog requires medical attention. Diseases and symptoms can vary, so it’s always best to consult your veterinarian if you notice any of the following signs.

Treating Portosystemic Shunts in Dogs: Veterinarian reviewed information on the treatment options for dog Portosystemic Shunts. Treatment options may vary, so a veterinarian is always the best resource to decide how to manage this condition.